10-14-2008
Hi Anni,
I have removed the entry of hostname.lcl and hostname from localhost line.
Some users were unable to login remotely so a smart guy rebooted the machine, unfortunatley it could not determine the ip so they /etc/hosts entry in the localhost was commented out. Then a second reboot was done.
The problem was not due to /etc/hosts but a failed disk, however when the machine rebooted the the ip conflict issue surfaced.
Anyway, regarding the sendmail issue I have solved with an entry like this:
1.2.3.4 hostname hostname.lcl
I don't see the annoying messages anymore.
IF I just put in a dot after the hostname, sendmail doesn't deliver the mail and I get the error 5.5.0.
Thanks
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LEARN ABOUT DEBIAN
hostname
HOSTNAME(5) /etc/hostname HOSTNAME(5)
NAME
hostname - Local host name configuration file
SYNOPSIS
/etc/hostname
DESCRIPTION
The /etc/hostname file configures the name of the local system that is set during boot, with the sethostname(2) system call. It should
contain a single newline-terminated host name string. The host name may be a free-form string up to 64 characters in length, however it is
recommended that it consists only of 7bit ASCII lower-case characters and no spaces or dots, and limits itself to the format allowed for
DNS domain name labels, even though this is not a strict requirement.
Depending on the operating system other configuration files might be checked for configuration of the host name as well, however only as
fallback.
HISTORY
The simple configuration file format of /etc/hostname originates from Debian GNU/Linux.
SEE ALSO
systemd(1), sethostname(2), hostname(1), hostname(7), machine-id(5), machine-info(5)
AUTHOR
Lennart Poettering <lennart@poettering.net>
Developer
systemd 10/07/2013 HOSTNAME(5)